package com.youcheng.config;

import com.youcheng.constant.ErrorTips;
import com.youcheng.utils.Constants;
import com.youcheng.utils.MyException;
import com.youcheng.utils.RedisUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 全局拦截器
 */

@Configuration
public class MyHandlerInterceptor implements HandlerInterceptor {

    @Autowired
    private RedisUtil redisUtil;


    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String token = request.getParameter("token");
        if(token == null){
            throw MyException.commonReturn(ErrorTips.commonErrorCode,ErrorTips.commonErrorMsg);
        }
        String tokenKey = Constants.TOKEN_PREFIX+token;
        if(!redisUtil.exists(tokenKey)){
            throw MyException.commonReturn(ErrorTips.tokenError,ErrorTips.tokenErrorMsg);
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}
